Nav bar not Showing in Firefox

Navigation bar not showing. There are some wordpress blogs that I visit that don't have the navigation bar at the top (my account, my blog, subscribe...). This doesn't happen in IE, but Firefox (even with all add-ons off) does have this problem. Suggestions?

When viewing the URL in your upper browser bar do the blogs in question have URLs containing "wordpress.com"? Or are they on they or they on domains and being domain mapped? We will need the URLs of the blogs in question. Will you please post them?

There are two types of wordpress blogs. Those hosted here (when you are logged in and viewing them you will have the admin bar at the top) and the other type is self-hosted wordpress sites using the software from wordpress.ORG. On self-hosted sites you will not see your admin bar since self-hosted sites are not connected in anyway to wordpress.COM.

I'm on 4.0 also and had no issue. Do you have add-ons installed in Firefox? If so, disable all of them, restart the browser and then turn the add-ons back on one at a time to see if one of them is causing the issue.